Device for protecting electric lines and apparatus against overtension.



s. mi STEPANI. DEVICE FOR PROTECTING ELECTRIC LINES AND APPARATUS AGAINST OVERTENSION.

APPLICATION FILED 0CT.16, 1912.

1,070,743, Patented Aug. 19, 1913."

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COLUMBIA PLANOQRA PH C0..WA$H1NGTON, D c.

S. DE STEFANI.

- DEVICE FOR PROTECTING ELECTRIC LINES AND APPARATUS AGAINST OVERTENSION.

APPLICATION FILED 00'1.16, 1912.

1,070,743, I Patented Aug. 19, 1913.

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mum-u mum am, WASHINGTON. D. C.

STEFANO Di STEFANI, OF VERONA, ITALY.

DEVICE FOR PROTECTING ELECTRIC LINES AND APPARATUS AGAINST OVERTENSION.

Specification of Letters Patent.

Patented Aug. 19,1913.

Application filed October 16, 1912. Serial No. 726,152.

To all whom it may concern:

Be it known that I, STEFANO DE STEFANl, engineer, a subject of the King of Italy, and residing at Via Leoni 1, Verona, Italy, have invented new and useful Improvements in Devices for Protecting Electric Lines and Apparatus Against Overtension, of which the following is a specification.

This invention relates to devices for protecting relatively low tension lines from accidental relatively high tension current such as are commonly known as lightning arresters.

The principal object of the invention is to improve and simplify devices of this character.

The second object of the invention is to provide an improved ground connection for such devices.

WVith the above and other objects in View the invention consists in general of certain novel features of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed.

In the accompanying drawings, like characters of reference indicate like parts in the several views; and Figure 1 shows diagrammatically one form of the device showing two zig-zag horns. Fig. 2 shows a similar device with the horns arranged spirally. Fig. 3 shows a front view and side view combined of a four horn type of the invention. Fig. 4 shows a diagrammatical View of a spiral three horn type of the invention. Fig. 5 is a modified view showing two grounds. Fig. 6 is a diagrammatical view with resistance interposed between the inductive plates and the ground. Fig. 7 shows a different method of connecting the device to the line wires. Fig. 8 shows a second method of accomplishing the result shown in Fig. 6. Fig. 9 shows a third method of accomplishing the same result.

In carrying out this invention there is provided a line wire 10 whereon is interposed a series of coils 11 each may be either arranged in zig-zag relation as shown in Fig. 1 or in spiral relation as shown in Fig. 2. These coils are preferably provided each with two portions at right angles and with arcuate portions connecting the two right angle portions as shown in Fig. 2 or rebent upon each other as shown in Fig. 1.

The above coils may be simple, single coils as shown in the above figures or may be multiple coils as shown in Figs. 3, 4, and 5. It will be understood that these coils may be carried from one side to the other, as indicated in Fig. 5 or may be simply arranged on one side as indicated in the remaining figures. Opposed to these coils is a member 12 which is connected by a ground wire 13 with a ground 14 and this member 12 is preferably of iron, or the like substance and is provided with horns of similar shape to the respective coil segments as indicated at 15 and of the same capacity as the iron or other body substance. These horns are interposed between adjacent coils and serve to spread and consequently resist the inductive discharge from said coils.

In the form of the device illustrated in Fig. 6 a resistance K is interposed between the plate 15 and the ground 14.

In the form of the device shown in Fig. 7 the coils, instead of being connected in series, are in parallel to the line wires 10. The line wires 10 may also be branched in this form as clearly shown.

In the form of the device shown in Fig. 8 there is employed a supplemental lightning arrester connected to the horns 15 and between this lightning arrester and the ground may be interposed a resistance R.

In the form of the device shown in Fig. 9 intermediate horns 16 are interposed between the horns 15 and the coils 11 and these intermediate horns are preferably symmetrical as clearly shown in this figure. By means of this form one or more gaps are made between the intermediate horns and the device becomes suitable for extremely high tension current such as lightning while at the same time the plates 15 are not made too large. By means of these broad thin plates having curved edges interposed between the coils of wire the discharge of electricity due to high tension will. be a silent and gradual discharge.

There has thus been provided a simple and eflicient device of the kind described, and for the purpose specified.

Having thus described the invention, what is claimed as new, is

1. In a lightning arrester gap, a grounded element provided with a series of thin plates of relatively great surface area opposed to the line element.

2. In a lightning arrester gap, the combination with a series of coils arranged to transmit a current of a series of plates of relatively great surface area compared to the tion of said coils and interposed between ad- 10 line element arranged between said coils, jacent coils. and a common grounded connection to all of In testimony that I claim the foregoing said plates. as my own I have heretoaflixed my signa- 3. In a device of the kind described, a seture in the presence of tWo Witnesses.

ries of coils of Wire, each coil having an arc- STEFANO D1 1 STEFANI.

uate portion; in combination With a ground- Vitnesses:

ed element provided With a series of plates CARL R. LooP,

having edges symmetrical to the arcuate por- O. J. WVoR'rH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, 1).0. 

